I had written an article on the second topic last year. However, Shaikh Al-Albani makes a terrific point about how the ibaadah (worship) of the woman prior to her menstruation would make a difference. The same issue applies to ill people as well. It’s an excellent point that everyone needs to understand.

PS. He mentions the 27th night in particular as he holds that this is Laylatul Qadr. However, as I explained in this post, there is a difference of opinion of the scholars on this issue.